package model;

import com.mysql.jdbc.jdbc2.optional.MysqlDataSource;

import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: ling
 * Date: 2022-10-31
 * Time: 16:02
 */
public class DBUtil {
    private static DataSource dataSource = null;
    private static DataSource getDataSource() {
        if(dataSource == null) {
            synchronized (DBUtil.class) {
                if(dataSource == null) {
                    dataSource = new MysqlDataSource();
                    ((MysqlDataSource)dataSource).setURL("jdbc:mysql://127.0.0.1:3306/blog_system?characterEncoding=utf8&useSSL=false");
                    ((MysqlDataSource)dataSource).setUser("root");
                    ((MysqlDataSource)dataSource).setPassword("123456");
                }
            }
        }
        return dataSource;
    }
    public static Connection getConnection() throws SQLException {
        return dataSource.getConnection();
    }
    public static void close(Connection connection, PreparedStatement statement, ResultSet resultSet) {
        if(resultSet!=null) {
            try {
                resultSet.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        if(statement!=null) {
            try {
                statement.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        if(connection!=null) {
            try {
                connection.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}
